Application of matrix-assisted laser desorption ionization time-of-flight mass spectrometry in pulsed laser polymerization. Chain-length-dependent propagation rate coefficients at high molecular weight: An artifact caused by band broadening in size e

Willemse RXE.; Staal BBP.; van Herk AM.; Pierik SCJ.; Klumperman B.

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Application of matrix-assisted laser desorption ionization time-of-flight mass spectrometry in pulsed laser polymerization. Chain-length-dependent propagation rate coefficients at high molecular weight: An artifact caused by band broadening in size e

机译：基质辅助激光解吸电离飞行时间质谱在脉冲激光聚合中的应用。高分子量下链长相关的传播速率系数：由尺寸e的谱带展宽引起的伪像

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The combination of matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-ToF-MS) and size exclusion chromatography (SEC) combined with pulsed laser polymerization has been used to evaluate propagation rate coefficients (k(p)) in bulk free-radical polymerization for the systems methyl methacrylate and styrene. By varying laser frequencies, the relation between polymer chain length and observed propagation rate coefficient (k(p)(obs)) has been investigated in detail. It has been found that deviations between MALDI-ToF-MS and SEC at higher molecular weights are the result of instrumental effects in SEC. Moreover, using a model and taking into account experimental studies on the propagation of oligomeric species, it has been inferred that the relationship between k(p)(obs) and polymer chain length is the result of chain-length-dependent behavior of the true k(p) in the oligomeric range, therewith excluding any chain-length-dependent behavior at higher molecular weights. [References: 56]

机译：基质辅助激光解吸电离飞行时间质谱（MALDI-ToF-MS）和尺寸排阻色谱（SEC）与脉冲激光聚合相结合已被用于评估分子筛中的传播速率系数（k（p））甲基丙烯酸甲酯和苯乙烯体系的本体自由基聚合。通过改变激光频率，已详细研究了聚合物链长与观察到的传播速率系数（k（p）（obs））之间的关系。已经发现，在较高分子量下，MALDI-ToF-MS和SEC之间的偏差是SEC中仪器作用的结果。此外，使用模型并考虑到对低聚物质的扩散的实验研究，可以推断出k（p）（obs）与聚合物链长之间的关系是真实链长依赖于行为的结果。 k（p）在低聚物范围内，因此排除了在较高分子量下任何依赖链长的行为。 [参考：56]

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《Macromolecules》 |2003年第26期|共7页
作者
Willemse RXE.; Staal BBP.; van Herk AM.; Pierik SCJ.; Klumperman B.;
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正文语种 eng
中图分类化学;
关键词
Free-radical polymerization; Flash-initiated polymerization; Individual kinetic constants; Evaluated rate coefficients; Polydisperse polymers; Methyl-methacrylate; Sample preparation; Consistent values; Rate parameters; Styrene;

机译：自由基聚合;闪蒸聚合;单个动力学常数;评估的速率系数;多分散聚合物;甲基丙烯酸甲酯;样品制备;恒定值;速率参数;苯乙烯;

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1. Application of matrix-assisted laser desorption ionization time-of-flight mass spectrometry in pulsed laser polymerization. Chain-length-dependent propagation rate coefficients at high molecular weight: An artifact caused by band broadening in size e [J] . Willemse RXE., Staal BBP., van Herk AM., Macromolecules . 2003,第26期

机译：基质辅助激光解吸电离飞行时间质谱在脉冲激光聚合中的应用。高分子量下链长相关的传播速率系数：由尺寸e的谱带展宽引起的伪像
2. Measurement of uncertainty in peptide molecular weight determination using size-exclusion chromatography with multi-angle laser light-scattering detection and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry [J] . Alexis Oliva, Jose B.Farina, Matias Llabres Analytica chimica acta . 2004,第1期

机译：使用尺寸排阻色谱法，多角度激光散射检测和基质辅助激光解吸/电离飞行时间质谱法测定肽分子量中的不确定性
3. Accurate mass measurement of low molecular weight compounds by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry [J] . Fukai T., Nomura T., Kuroda J. Journal of the American Society for Mass Spectrometry . 2000,第5期

机译：基质辅助激光解吸/电离飞行时间质谱法对低分子量化合物进行准确的质量测量
4. Identification of Proteins in Unsequenced Bacterial Strains Via Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Identification of Proteins in Unsequenced Bacterial Strains Via Matrix-Assisted Laser Desorption/Ionization Mass Spectromet [C] . Daisy-Malloy Hamburg, Moo-Jin Suh, Patrick A. Limbach International Symposium on Runaway Reactions, Pressure Relief Design and Effluent Handling American Institute of Chemical Engineers/American Chemical Society Management Conference . 2005

机译：通过基质辅助激光解吸/电离质谱法通过基质辅助激光解吸/电离质谱鉴定通过基质辅助激光解吸/电离质谱鉴定蛋白质中的蛋白质中蛋白质的鉴定
5. Laser desorption/laser ionization time-of-flight mass spectrometry instrument design and investigation of the desorption and ionization mechanisms of matrix-assisted laser desorption/ionization. [D] . King, Richard Charles, III. 1994

机译：激光解吸/激光电离飞行时间质谱仪的设计以及基质辅助激光解吸/电离的解吸和电离机理研究。
6. Molecular Characterization of High Molecular Weight Polyesters by Matrix-Assisted Laser Desorption/Ionization High-Resolution Time-of-Flight Mass Spectrometry Combined with On-plate Alkaline Degradation and Mass Defect Analysis [O] . Sayaka Nakamura, Thierry Fouquet, Hiroaki Sato -1

机译：基质辅助激光解吸/电离高分辨飞行时间质谱结合板载碱降解和质量缺陷分析对高分子量聚酯进行分子表征
7. Accurate mass measurement of low molecular weight compounds by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry [O] . Fukai Toshio, Kuroda Jun, Nomura Taro 2000

机译：基质辅助激光解吸/电离飞行时间质谱法对低分子量化合物进行准确的质量测量

Application of matrix-assisted laser desorption ionization time-of-flight mass spectrometry in pulsed laser polymerization. Chain-length-dependent propagation rate coefficients at high molecular weight: An artifact caused by band broadening in size e

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